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TBS_E_COMMAND_CANCELED
Technical interpretation
TBS_E_COMMAND_CANCELED (0x8028400D) belongs to the public and internal TPM Base Services path. It indicates a command submitted through TBS was canceled before a normal TPM result was returned.
Inputs and state to capture
| Question | Evidence |
|---|---|
| What exact state was rejected? | a command submitted through TBS was canceled before a normal TPM result was returned |
| Which layer owns the result? | The TBS client library, local RPC service and command scheduler before or around device execution. |
| What must be correlated? | context handle, cancel request, power transition, service shutdown, command duration, caller timeout, and whether the command has side effects |
| Controlled comparison | repeat a known idempotent command without cancellation and trace the context until completion |
Validate without broad changes
Use the following verification sequence:
- Capture the unmodified failing input and
0x8028400D. - Repeat a known idempotent command without cancellation and trace the context until completion.
- Compare the first divergent field or state transition.
- Repeat the operation only after restoring the same baseline, with a bounded retry policy where the specification permits retry.
Neighboring response codes
| Other code | Why a different remedy follows |
|---|---|
TBS_E_BUFFER_TOO_LARGE | The input or output buffer is too large. |
TBS_E_SERVICE_START_PENDING | The TBS service has been started but is not yet running. |
TBS_E_ACCESS_DENIED | The caller does not have the appropriate rights to perform the requested operation. |
TPM_E_RETRY is a device request to resubmit; cancellation is imposed by TBS, the caller, or power management. The result difference determines whether to change serialization, authorization, resource lifetime, firmware/PPI state, command policy or only retry timing.
Fix and verify
Correct the original boundary by choosing this direction: coordinate cancellation and object lifetime, then recreate volatile state that may have been lost across the canceled operation. Do not restart or disable TBS before capturing its service and event data. Most caller-contract errors are reproducible without touching TPM ownership, firmware state or stored keys.
Technical references
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